So I've got these 2 sites that have been around a long time, and actually got quite a lot of natural backlinks from other real sites. But their rankings have dropped over time. So I'm thinking, instead of building new tier 1 links from scratch, why not just treat the ones I already have as tier 1, and then continue from there? Site 1's links are mostly from forums, thousands upon thousands of forum posts on various domains, a large number of which are in foreign languages. Site 2's links are mostly sidebar links on random people's personal web 2.0 blogs and a couple other sites and a few forums. Can I consider these as tier 1? How many links would be a reasonable amount to give each one, to stay safe? I've never actually used any mass backlinking tools before in my life ever, so I guess I just want to make sure I'm not gonna do a bad thing here. What would you guys do?